endpointCnt is a refcounter used to track how many endpoints use a
network, and how many networks references a config-only network. It's
stored separately from the network.
This is only used to determine if a network can be removed.
This commit removes the `endpointCnt` struct and all its references. The
refcounter is replaced by two lookups in the newly introduced `networks`
and `endpoints` caches added to the `Controller`.
Signed-off-by: Albin Kerouanton <albinker@gmail.com>
The `Controller`'s store is used by:
- `deleteFromStore`
- `getEndpointFromStore`
- `getEndpointsFromStore`
- `updateToStore`
- … and other methods that can't store / delete / retrieve an Endpoint
Calls to `updateToStore` and `deleteFromStore` have been replaced with
`upsertEndpoint` and `deleteEndpoint`.
Both `getEndpointFromStore` and `getEndpointsFromStore` call
`cacheEndpoint` to ensure endpoints loaded from the datastore are kept
in-memory.
Finally, `sandboxRestore` was instantiating `Endpoint` itself. These are
cached too.
Signed-off-by: Albin Kerouanton <albinker@gmail.com>
